Programming 89v51Rd2 problem

[dani]

Dear all,
i want to change the bootloader of 89v51rd2 so i had gone to isp->update bootloader and then
given updated file name and press update.
i could able to update one microcontroller but when i tried with other microcontroller(89v51rd2)
it stopped in erasing part and not able to come out of it.
now i couldn't put microcontroller in isp mode nor i could able to put it into execution mode.
even after resetting it's not getting programmed

[Andy Ayre]

Sounds like perhaps the power supply had a glitch during programming. It's hard to tell without probing the board and your best chance now might be a parallel programmer.

Andy